<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
</body>
<script src="https://unpkg.com/vue@next"></script>
<script>
    const app=Vue.createApp({
        template:`
        <layout-demo>
            <template v-slot:header>
                <h1>Here Might be a page title</h1>
            </template>
        <template v-slot:default>
            <p>A paragraph for the main content.</p>
            <p>And another one.</p>
        </template>
        <template v-slot:footer>
            <p>Here's some contact info</p>
        </template>
        </layout-demo>`
    })
    app.component('layout-demo',{
        template:`
        <div class="container">
            <header>
                <slot name="header"></slot>
            </header>
            <main>
                <slot name="default"></slot>
            </main>
            <footer>
                <slot name="footer"></slot>
            </footer>
        </div>
        `
    })
    app.mount('#app')
</script>
</html>